Cutter



W. S. JONES Oct. 28, 1930.

CUTTER Filed Sept. 23, 1927 l INVENTOR. Wmfzela 5f Jones;

A TTORNE YS.

Patented Oct. 28, 14930 {UN-HBD STATES `1Pai-fseur-orricrafffi WINFIELD S.V.I0N,ES, or LONGBEACH, CALIFORNTA, AssIGYNoR, `BY DIRECT vAND MESNEI ASSIGNMENTS, T o KAM-Manna CORPORATION, oF SANTA FEYSPRINGS, cALTEomIIA,`

lAp CORPORATION OF CALIFORNLS.l i

GUTTERV -.j

" A ppneaoxi mea septemberrzs, iseafseriai N0."221,4s9.

This' invention contemplates an improvement upon my invention for cutter as described in UnitedStates VvLetters lPatent granted me 'January 18, 1927, No. 1,614,340.`

In particular 'the present .invention I contemplates a novel means and method whereby the cutter bladesfofsaid' cutter are main-V tained in a definiteposition during lowering of my cutter within. aA wellhole.. In particu lar the cutter abou-tito be described is known as an outside downwardly acting cutter in thatV the said cutterl is 'adapted to surround the pipe toibe ycutand VVthe cutters are adapted to be projected into engagement withthe out# side of theV pipe for a cutting operation upon a' downward movement ofthe said cutter.

An' object of the present invention is to provide a noveland simple means'for maintaining the "cutterblades in a given position,

and'which is 1positivel and likewise fool-proof in its operation, 'In a udevice oiithischarfV acter, it is essentialfthat some positive means be utilized ormaintaining the cutter blades ini a givenposition until it isde's'ired lto oper-` Varijous yielding means suchA as springs have beenv utilized for this;purpose,v butare notalways satisfactory dueytovari# ate theV cutter'.

ous abrasive4 nlaterial within thej 'well hole which tends to break such vmemberis andallow theV cutter blades to contlact'with different objects within the'well hole, which oftenlruin the cutterV blades. a The present inventionovercomesthis .defect by'providing means for positively maintaining the cutter Vblades a certain vposition against movement at all times when the cutter is being lowered within the well hole and until it' is vdesired to utilize said cutter. a

` In the drawi'ngzjV Fig. 1V is a-vertlcal -sectional elevation of" the improved cutter asanentiretyand utiliz; ing the improved invention; Y

' Fig. 2 is affragmentarydetail Vm vertical section o1 the cutter blades and the means for operating the said cutter blades;

` Fig;V 3 is ,a transverse section on thev line :5+30f13`ig-2;

' Fig. 4 is a sectional form oi'means in a given position;

lemma of a modified for holding the cutterblades.

Figf is a. cross sectional view' on the line 5-'5 of Fig. 4; i

Fig. 6 is an elevation of' .the means shown Y inFigs4and5; e Y. v y Fig, 7 is a vertical elevation of a modilied form of the means for holding vthe. cutterV blade; Y f Y Fig. 8 is a cross sectional view onthe line 8-8ofFig.7;and v.

Fig. 9 is a fragmentary cross sectional view yon an enlarged scale of a trip or latch element.

associated with the cutter.

Qorresponding parts in all the yligures; are designated by the same reference characters.

Referring now with particularity tol the drawing, the improved cutteras anentirety and as shown in Fig. 1,`is designated by A. This cutter includes in combination the following elements: an annularcutter shell a,y

one end oi which is secured to drive tubing b and the opposite end of which` is securedto an annular latch barrel 0. c cutter shell and likewise Secured'tothe latch barrel is a friction carrier sleeve d, Awhich sleeve d Vcarries bowed springs e adapted to engage the periphery of drill stem pipe B. Also within the saidcuttersleeve is na drive sleeve #which is connected through the me-` Within the dium of'a rotatable connector g with astool c cage L.V Cutters 7' are hingedly connectedto the cutter Sleeve `and are receivedwithin slots of the cutter, shell. The upper endof the drive sleeve fris bevelledasshown at 1l for engagement with the cutterl blades. Ineluded as between the drive sleeve andthe cutterY shell-is a coil spring 2. `The stool cage 7L is.' adapted to carry4 vstools 3, which stools are coniined within, slotsof the stool cage'.v Alatch` k is carriedbyfthe latch bar rel @and when in the positionshown in Fig. 1 locks the friction carrier sleeve andcutter shell, throughthe medium ofthe latch barrel, together.`. The latch ,7c is receivable within a slot 33 inthe latch barrel 0 yandsaid latch is held in latching position by a pin 34 passing therethrough and into the Wall of Vj the vmember c, .saidy latch being formed withafshoulderedwportion 35, with a coil spring 36 wrapped about-the pin 34 and having one end engaging the shoulder 35 and the other slot of the cutter shell.

end engaging with a wall bounding the slot 33. Said latch is formed with a notch 37 and a limiting pin 38 is carried by the member c to limit outward swinging of the latch, said pin 38 being received in the notch 37 when the latch is urged outwardly by the spring 36 so as to release the member c from the member d. The latch is formed with a shouldered end 39 and the normal position for said latch is that` shown in Figure 9, thelatch being held in such position, inwardly from the slot 33, by a small wire, or other frangible shear element 40, passed through an opening in said latch and having its end or ends bearing against the inner face of the member c. The latch when in the position shown in Figure 9 is adapted to be received in a keeper notch or slot 41 of the member d and thus prevent the member c from being rotated to disconnect it from the member d, As the drive tubing moves the cutter downwardly, the stools 3 will, due to movement of the friction carrier sleeve upwardly, engage the coupling m' and in so doing will permit the drive sleeve f to engage the cutter or cutter blades .7' andforce the same inwardly for engagement with the drill stem pipe, as shown by the dotted lines for said cutter blade in Fig. 2.

VIt is essential7 as has been stated in the objects, that the cutter blades be maintained within the slot or slots of the cutter shell during lowering operation of the cutter as an entirety within the well hole. This is accomplished through any one of the several means shown in Figs. 2 to 8 inclusive. The form of the invention shown in Figs. 2 and 3 is designated as Cj the formshown in Figs. 4, 5 and 6 by D, and Figs. 7 and 8 by E. All of the said means operate on the same principle and comprise a positive and yet yieldable means for. holding the cutter blade against movement until the drive sleeve engages the cutter to positively move the same into engagement with the drill stem pipe.

. The form shown and designated by C includes a wire or the like, which is severable upon movement of the cutter blade. In this connection the said member surrounds in part the cutter blade y' as shown at 10 with ends of said member anchored in the cutter shell by being received within slots of the cutter shell as shown at 11 and 12. When f, the-drive sleeve f is moved toengage the cutter blade, the cutter blade will shear the said means and release the cutter. It is obvious that until such means is sheared that the cutter blade is maintained within the The said means is readily replaceable as would be obvious.

The form of the invention designated as D comprises a shearable or frangible pin 20, passed through a bore 21 in the cutter shell a, with a portion of said frangible pin received within a recess or bore 22 of the cutter blade, the operation would be the same as before. This pin 2O may be slightly tapered so that the same may be readily removed from the bore 21 after the saine has been sheared, if desired, and in this connection the recess 22 would likewise be slightly tapered for the same reason. Thus it is possible to keep mov- 'ing the pin inwardly as lengths thereof are sheared and until the pin is entirely used up.

The form of the invention designated as E likewise includes a pin30-passed through a bore 31 in the drive sleeve f. In this con nection the cutter blade is provided on one face 'thereof'V with* an inclined groove 32 and within which groove the said pin is in part received. Thus when the driving sleeve is moved upwardly the pin is sheared as it travels along said inclined groove.

The operation is as follows:

Assuming that the parts are in the posi tion'shown in Fig. 1`, in which it will be noted that the cutter elements j are out of contact with the periphery of the drill stem B, the

latch is in the position of'service or, in other words, in position to maintain the members c, cl in working relation and in such relation that they do not unscrew from one another. The member A has beeny lowered by means of the drive` tubing b and the lower end of said member A may carry a wash-'over shoe, not shown, which may be screwed into the lower end of the latch barrel c. The stools 3 are out of position of service and the spring member e isiin engagement with the periphery of the drill stem B. When the latch' 7c contacts with the ledge in a coupling m, joining two lengths of the drill stem B, the means 40, will be sheared and the latch member c retracted by the spring 36 within the slot 33 of the member c. It may be necessary to rotate the member A through the medium of the drive tubing Z) in order that it may reach a desired location within the'well hole, and a further turning of the member b,wi1l, when the latch 70 has been retracted'by the spring, unscrew the member d from the member 0, thus permitting the member d to be moved downwardly. This downward movement of the member D will be constrained by the spring e being in frictional engagement with the periphery of the drill stem B, and the cutter shell a upon its continuous downward movement will cause the expansible member 2 to be compressed, thus permitting continued movement of the parts to position where the stools 3 will have their legs in engagement withthe ledge formed by the upper end of the coupling m; this being effected by the member d moving relative to the shell a and forcing the stools 3 inwardly so that the leg members thereof engage with the` ledge of the coupling. Furthermore, this downward movement of the shell a relative to the member Z likewise effects a relative movement between the members f and a inasmuch as the members h and f are coupled by the rotatable connection g. The bevelled upper end Z ofthe sleeve f will force the cutters j into engagement with the periphery of the stem B to cut the saine. Y

It is obvious that various changes, modications and variations may be Vmade in practising the invention in departure from the particular showing of the drawing without departing from the true spirit thereof.

VHaving thus disclosed lmy invention, I claim and desire to secure by Letters Patent: A cutter for oil well tubing and the like comprising a cutter shell, a cutter blade carried thereby, means for moving said cutter blade into tubing engagement, and means secured to the cutter shell and engaging the cutter blade for positively maintaining said cutter blade in a given position relative to Y the cutter sleeve until said cutter blade is actuated by said rst named means, said second named means comprising a rangible U-shaped member embracing the cutter, the out-turned ends of the rangible member being anchored in slots in the outer face of the shell. Y In testimony whereof, I have signed my name to this specification. 'e WINFIELD s; JONES. 

